The removable harness on our super tough burly Hydraulic Dry Pack makes portaging a whole lot easier - whether on the river, in the airport or anywhere else where carrying large amounts of gear is a chore. The Hydraulic™ harness is an open construction of EVA foam and air mesh, allowing plenty of air flow and rapid drying without sacrificing comfort. The harness attaches to compatible Hydraulic™ Dry Bags (35L - 120L) with a series of buckles as tough as the bags themselves.